Libertarianism is a political philosophy that holds that individuals should be allowed complete freedom of action as long as they do not infringe on the freedom of others.
Libertarian socialism is any one of a group of political philosophies dedicated to opposing coercive forms of authority and social hierarchy, in particular the institutions of capitalism and the state.

The term authoritarian is used to describe an organization or a state which enforces strong and sometimes oppressive measures against the population, generally without attempts at gaining the consent of the population.